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Authors Rueda, J.C. ; Suica, R. ; Komber, H. ; Voit, B.
Title Synthesis of New Polymethyloxazoline Hydrogels by the "Macroinitiator" Method
Date 03.06.2003
Number 10994
Abstract New polymethyloxazoline hydrogels are synthesized by the cationic ring-opening copolymerization of 2-methyl-2-oxazoline and 2,2<IMGSRC="/giflibrary/12/prime.gif"BORDER="0">-tetramethylenebis(2-oxazoline), using random copolymers of chloromethylstyrene and methyl methacrylate, or of chloromethylstyrene and styrene as macroinitiators. The synthesis is carried out in benzonitrile at 110&nbsp;°C in the presence of potassium iodide, which activates the chloromethyl group as initiating functionality. In general, the hydrogels are obtained very rapidly, with a yield of between 42 and 95 wt.-%. Besides its initiating function, the macroinitiator also provides the possibility of introducing heterogeneity into the hydrogel structure by forming rigid hydrophobic domains. The hydrogel structures were characterized by high-resolution magic angle spinning NMR spectroscopy, and their solvent absorption capacity was determined by swelling experiments in solvents of different polarity. The hydrogels showed a maximal swelling degree of 18 g of water and 40 g of methanol, respectively, per gram of the hydrogel.
Publisher Macromolecular Chemistry and Physics
Wikidata
Citation Macromolecular Chemistry and Physics 204 (2003) 954-960
DOI https://doi.org/10.1002/macp.200390065
Tags high-resolution magic angle spinning nmr hydrogels macroinitiator polyoxazoline swelling nonionic hydrogel graft-copolymers polymerization 2-methyl-2-oxazoline chloromethylstyrene methacrylate amphigel

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